ISO 23146:2012规定了一种测定高级工业陶瓷断裂韧性的方法。该程序使用单边V形缺口钢筋，在四点弯曲中加载，直至失效。它适用于晶粒尺寸或主要微观结构特征尺寸大于约1μm的单片陶瓷。 不建议对钇四方氧化锆多晶材料（Y-TZP）使用ISO 23146:2012。该方法也可能不适用于其他非常坚硬或柔软的陶瓷，其中V形缺口根部不会形成尖锐裂纹。

ISO 23146:2012 specifies a method for the determination of the fracture toughness of advanced technical ceramics. The procedure makes use of single-edge V-notched bars, which are loaded in four-point bending until failure. It is applicable to monolithic ceramics with a grain size or major microstructural feature size larger than about 1 μm. The use of ISO 23146:2012 for yttria tetragonal zirconia polycrystal material (Y-TZP) is not recommended. The method might also be unsuitable for some other very tough or soft ceramics in which a sharp crack does not form at the root of the V-notch.